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A comprehensive review of Pt electrocatalysts for the oxygen reduction reaction: Nanostructure, activity, mechanism and carbon support in PEM fuel cells

Journal

JOURNAL OF MATERIALS CHEMISTRY A
Volume 5, Issue 5, Pages 1808-1825

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta08580f

Keywords

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Funding

  1. European Commission's Marie Sktodowska-Curie Individual Fellowships (IF-EF) [H2020-MSCA-IF-2014, 658217]
  2. National Natural Science Foundation of China [21476157, 21576164, 91334206]
  3. Marie Curie Actions (MSCA) [658217] Funding Source: Marie Curie Actions (MSCA)

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The sluggish rate of the oxygen reduction reaction (ORR) in proton exchange membrane (PEM) fuel cells has been a major challenge. Significantly increasing efforts have been made worldwide towards a highly active ORR catalyst with high durability. Among all the catalysts exploited, Pt electrocatalysts are still the best in terms of a comprehensive evaluation. The investigation of Pt-based ORR catalysts is necessary for a practical ORR catalyst with low Pt content. This paper reviews recent progress in the studies of the mechanism, nanostructure, size effect and carbon supports of Pt electrocatalysts for the ORR. The importance of the size and structure control of Pt ORR catalysts, related with carbon support materials, is indicated. The potential methods for such control are discussed. The progress in theoretical studies and in situ catalyst characterization are also discussed. Finally, challenges and future developments are addressed.

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